Light guide module

Abstract

A light guide module includes a light guide plate, a light-emitting element and a covering layer. The light guide plate includes plural first light-guiding dots and plural second light-guiding dots. The light-emitting element is installed on a lateral edge part of the light guide plate. The covering layer includes a non-shading region, a separation region and a shading region. The plural first light-guiding dots of the light guide plate are aligned with the non-shading region of the covering layer. The plural second light-guiding dots of the light guide plate are aligned with the shading region of the covering layer. The plural second light-guiding dots are covered by the shading region of the covering layer.

What is claimed is: 
     
       1. A light guide module, comprising:
 a base plate; 
 a light guide plate installed on the base plate, wherein the light guide plate comprises plural first light-guiding dots and plural second light-guiding dots; 
 a light-emitting element installed on a lateral edge part of the light guide plate; and 
 a covering layer, wherein the light guide plate is covered by the covering layer, and the covering layer comprises a non-shading region, a separation region and a shading region, wherein the separation region is arranged between the non-shading region and the shading region, and the non-shading region and the shading region are separated from each other by the separation region, 
 wherein the plural first light-guiding dots of the light guide plate are aligned with the non-shading region of the covering layer, the plural second light-guiding dots of the light guide plate are aligned with the shading region of the covering layer, and the plural second light-guiding dots are covered by the shading region of the covering layer. 
 
     
     
       2. The light guide module according to  claim 1 , wherein the light guide plate further comprises plural third light-guiding dots, and the plural third light-guiding dots are aligned with the separation region of the covering layer. 
     
     
       3. The light guide module according to  claim 2 , wherein when the plural second light-guiding dots are covered by the shading region of the covering layer, the plural third light-guiding dots are exposed to the separation region of the covering layer. 
     
     
       4. The light guide module according to  claim 2 , wherein the plural third light-guiding dots are arranged between the plural first light-guiding dots and the plural second light-guiding dots. 
     
     
       5. The light guide module according to  claim 2 , wherein the plural third light-guiding dots are arranged between the plural second light-guiding dots. 
     
     
       6. The light guide module according to  claim 1 , wherein the plural second light-guiding dots are aligned with an edge of the shading region of the covering layer. 
     
     
       7. The light guide module according to  claim 1 , wherein the plural first light-guiding dots, the plural second light-guiding dots and the plural third light-guiding dots are distributed on a whole plate of the light guide plate. 
     
     
       8. The light guide module according to  claim 1 , wherein a distribution density of the plural first light-guiding dots corresponding to the non-shading region of the covering layer is higher than a distribution density of the plural second light-guiding dots corresponding to the shading region of the covering layer. 
     
     
       9. The light guide module according to  claim 1 , wherein the light guide module further comprises a pattern layer, wherein the pattern layer is located over the covering layer, and the pattern layer comprises a text region and an opaque region, wherein the text region is aligned with the non-shading region of the covering layer, and the opaque region is aligned with the shading region and the separation region of the covering layer. 
     
     
       10. The light guide module according to  claim 1 , wherein the light guide module further comprises a bottom layer, wherein the bottom layer is arranged between the base plate and the light guide plate, and the bottom layer is an adhesive layer or a reflective coating layer. 
     
     
       11. The light guide module according to  claim 1 , wherein the covering layer is an adhesive layer or a light-shading coating layer. 
     
     
       12. A light guide module for a touch pad, the light guide module comprising:
 a base plate; 
 a pattern layer located over a covering layer, wherein the pattern layer comprises plural text regions and an opaque region; 
 a light guide plate arranged between the base plate and the pattern layer, wherein the light guide plate comprises plural first light-guiding dot regions and plural second light-guiding dot regions, wherein the plural first light-guiding dot regions are aligned with the corresponding text regions of the pattern layer, and the plural second light-guiding dot regions are aligned with the opaque region of the pattern layer; 
 a covering layer arranged between the pattern layer and the light guide plate, wherein the light guide plate is covered by the covering layer, and the covering layer comprises plural non-shading regions, plural separation regions and plural shading regions, wherein the plural non-shading regions of the covering layer are aligned with the corresponding first light-guiding dot regions of the light guide plate, and the plural shading region of the covering layer are aligned with the corresponding second light-guiding dot regions of the light guide plate; and 
 a light-emitting element installed on a lateral edge part of the light guide plate, 
 wherein the plural first light-guiding dot regions of the light guide plate are exposed to the corresponding non-shading regions of the covering layer and the corresponding text regions of the pattern layer, 
 wherein the plural second light-guiding dot regions of the light guide plate are covered and shaded by the corresponding shading regions of the covering layer, so that the plural second light-guiding dot regions are not exposed to the opaque region of the pattern layer. 
 
     
     
       13. The light guide module according to  claim 12 , wherein each of the plural first light-guiding dot regions comprises plural first light-guiding dots, and each of the plural second light-guiding dot regions comprises plural second light-guiding dots, wherein a distribution density of the plural first light-guiding dots in each of the plural first light-guiding dot regions is higher than a distribution density of the plural second light-guiding dots in each of the plural second light-guiding dot regions. 
     
     
       14. The light guide module according to  claim 13 , wherein the plural second light-guiding dots in each of the plural first light-guiding dot regions are aligned with an edge of the corresponding shading region of the covering layer. 
     
     
       15. The light guide module according to  claim 12 , wherein the light guide plate further comprises plural third light-guiding dots, and the plural third light-guiding dots are aligned with the plural separation regions of the covering layer. 
     
     
       16. The light guide module according to  claim 12 , wherein each of the plural separation regions of the covering layer is arranged between the corresponding non-shading region of the plural non-shading regions and the corresponding shading region of the plural shading regions, and the corresponding non-shading region and the corresponding shading region are separated from each other by the corresponding separation region. 
     
     
       17. The light guide module according to  claim 12 , wherein the covering layer is an adhesive layer or a light-shading coating layer.